Desco 19234, Технический бюллетень

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DESCO WEST - 3651 Walnut Avenue, Chino, CA 91710 • (909) 627-8178
DESCO EAST
- One Colgate Way, Canton, MA 02021-1407 • (781) 821-8370 • Website: Desco.com
TB-3054 Page 1 of 6
© 2017 DESCO INDUSTRIES, INC.
Employee Owned
Multi-Mount Continuous Monitor
Installation, Operation and Maintenance
Description
Leading companies use continuous monitors as a
cost effective component in satisfying the paragraph
6.1.3 Compliance Verification Plan requirements
of ANSI/ESD S20.20. The Desco Multi-Mount
Continuous Monitor continuously monitors the integrity
of one operator. This monitor will provide virtually
instantaneous notification of static control equipment
failures, eliminating the need of periodic testing and
costly record keeping. This unit is highly cost effective
as it is designed to monitor any conventional single wire
wrist strap and ground cord system. Its small package
and mounting tabs with holes make it highly suitable to
install on most any equipment or work bench surface.
In addition, optional mounting is available using the
provided adhesive-backed Velcro
®
strips. Using either
mounting method makes the Multi-Mount Monitor
suitable for most any machinery or workbench even in
hard to reach locations.
The Multi-Mount Continuous Monitor is a real time
instrument that ensures that critical ESD generators in a
sensitive area are effectively grounded. The instant an
operator’s wrist strap or cord fails, the monitor will issue
audible and visual (LEDs) alarms alerting the user and
supervisor of the problem.
All Desco single-wire monitors with wave distortion
technology include the Park Snap feature. Use the
Park Snap to store the operator’s wrist cord and enable
standby mode while the operator is away from the
workstation. Before disconnecting the coil cord from
the wristband, the operator touches the Park Snap to
disable the audio alarm for 6 seconds. Within the 6
second period, the operator can disconnect their wrist
cord from their wristband and attach it to the Park Snap
before the audible alarm sounds.
May 2017
The Multi-Mount Monitor and its accessories are
available as the following item numbers:
Item Description
19228 Multi-Mount Monitor, North America
19229 Multi-Mount Monitor, with Jewel® Wrist Strap,
North America
19234 Multi-Mount Monitor, Universal Power Adapter
19236 Multi-Mount Monitor, with Jewel® Wrist Strap,
Universal Power Adapter
19258 Power Adapter, 100-240VAC Input, 24VDC
150mA Output, IEC Inlet
19260 Power Adapter, 100-240VAC Input, 24VDC
150mA Output, North America Plug
98220 Calibration Unit, for Wave Distortion Monitors
WAVE DISTORTION DETECTION TECHNOLOGY
PROVIDES TRUE 100% CONTINUOUS
MONITORING
From all the technical alternatives available, Desco
has chosen wave distortion technology for many of its
Continuous Monitor product offerings. Wave distortion
circuitry monitors current/voltage phase shifts and
provides true 100% continuous monitoring. Electrical
current will lead voltage at various points due to the
combinations of resistance and capacitive reactance.
By monitoring these “distortions” or phase shifts, the
wave distortion Multi-Mount Continuous Monitor will
reliably determine if the circuit is complete.
Wave distortion technology can be referred to “vector
impedance monitoring”. This description is valid as the
wave distortion technology measures the impedance
at the monitored banana jack and looks for changes
in either the capacitance or resistance of the circuit
which includes the wrist strap and its wearer. It uses
filtering and time domain sampling to filter out false
signals caused by voltage offsets, 60 Hz fields and other
electro-magnetic and electrostatic interference.
In normal factory environments, and with persons
whose capacitance with respect to ground is within
design limits (5 feet tall 90 pound person to 6 foot 5
inch 250 pound person), the Multi-Mount Continuous
Monitor cannot be “fooled”. It will provide a reliable
alarm only when the wrist strap becomes dysfunctional
or unsafe according to accepted industry standards.
The Multi-Mount Continuous Monitor is drift-free and
designed to be insensitive to the effects of squeezing or
stretching the coil cord.
TECHNICAL BULLETIN TB-3054
Made in the
United States of America
Figure 1. Desco Multi-Mount Continuous Monitor